Oscars ceremony

#include <iostream>
#include <string>

using namespace std;

int main() {
    int hallRent;
    cin >> hallRent;

    double statues = hallRent * 0.7;
    double catering = statues * 0.85;
    double soundSystem = catering / 2;

    printf("%.2f\n", hallRent + statues + catering + soundSystem);

    return 0;
}